BZDNG-238 was not completely fixed before. We have to get the position of the
edit start block before we delete anything, as the bug in QT messes up the
edit start block and its position information

Doing commit 0ab389cb the proper way: Instead of commenting out SelectionChanged, fixed the culprid in SequenceViewer::SelectionChanged (SequenceViewer::SelectList, using QItemSelection now)

Conflicts:
	deployment/linux/create_bundle.py
	modules/conop/doc/conop.rst
	modules/conop/src/heuristic_connect.cc
	modules/doc/install.rst
	modules/gfx/src/impl/cartoon_renderer.cc
	modules/gui/src/entity_explorer/entity_explorer.cc
	modules/gui/src/entity_explorer/entity_explorer_model.cc
	modules/gui/src/entity_explorer/entity_explorer_model.hh
	modules/gui/src/entity_explorer/menu_item.hh
	modules/gui/src/python_shell/python_shell_widget.cc
	modules/io/src/mol/entity_io_mae_handler.hh
	modules/io/src/mol/sdf_writer.cc
	modules/mol/alg/pymod/export_superpose_frames.cc
	modules/mol/base/doc/editors.rst
	modules/mol/base/pymod/export_bond.cc
	modules/mol/base/src/impl/query_impl.cc
	modules/mol/base/tests/test_residue.cc
	modules/qa/pymod/CMakeLists.txt
	modules/qa/pymod/__init__.py
	modules/qa/pymod/export_interaction.cc
	modules/qa/pymod/export_packing.cc
	modules/qa/pymod/export_reduced.cc
	modules/qa/pymod/export_torsion.cc
	modules/qa/pymod/pdbtools.py
	modules/qa/src/all_atom_potential.cc
	modules/qa/src/all_atom_potential.hh
	modules/qa/src/atom_types.cc
	modules/qa/src/atom_types.hh
	modules/qa/src/histogram.hh
	modules/qa/src/impl/reduced_impl.hh
	modules/qa/src/index.hh
	modules/qa/src/interaction_statistics.cc
	modules/qa/src/interaction_statistics.hh
	modules/qa/src/module_config.hh
	modules/qa/src/multi_classifier.hh
	modules/qa/src/packing_potential.cc
	modules/qa/src/packing_potential.hh
	modules/qa/src/packing_statistics.cc
	modules/qa/src/packing_statistics.hh
	modules/qa/src/rapdf.cc
	modules/qa/src/rapdf.hh
	modules/qa/src/reduced_potential.cc
	modules/qa/src/reduced_potential.hh
	modules/qa/src/reduced_statistics.cc
	modules/qa/src/reduced_statistics.hh
	modules/qa/src/solis_torsion_potential.cc
	modules/qa/src/solis_torsion_potential.hh
	modules/qa/src/solis_torsion_statistics.cc
	modules/qa/src/solis_torsion_statistics.hh
	modules/qa/src/torsion_potential.cc
	modules/qa/src/torsion_potential.hh
	modules/qa/src/torsion_statistics.cc
	modules/qa/src/torsion_statistics.hh
	modules/seq/base/pymod/export_sequence.cc
	modules/seq/base/src/sequence_handle.cc
	modules/seq/base/src/sequence_handle.hh
	scripts/dng_cl.in
	scripts/gipltng.bat.in
	scripts/gipltng.in

Stopped Entity::SetSelection from calling Scene::SelectionChanged since it does nothing but eating up performance. Since the functionality may be necessary in the future, it is just commented out in entity.cc.

fixed broken implementation to distinguish between batch mode (ost) and gui mode (gosty); now available as ost.gui_mode flag

This reverts commit 77521f73.

Superpose dialog (ost.gui.dng.superpositiondialog.SuperpositionDialog) now highlights chains during selection.